30-10-2012, 04:55 PM
Drilling Machine
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Drilling
Drilling is the operation of producing circular hole in the work-piece by using a rotating cutter called DRILL.
The machine used for drilling is called drilling machine.
The drilling operation can also be accomplished in lathe, in which the drill is held in tailstock and the work is held by the chuck.
The most common drill used is the twist drill.
Sensitive Drilling Machine
Drill holes from 1.5 to 15mm
Operator senses the cutting action so sensitive drilling machine
Drill Materials
The two most common types are
1. HSS drill
- Low cost
2. Carbide- tipped drills
- high production and in CNC machines
Other types are
Solid Carbide drill, TiN coated drills, carbide coated masonry drills, parabolic drills, split point drill